JPH01137182A - Meat ice-temperature maturing warehouse - Google Patents

Abstract

PURPOSE: To protect meat against discoloring, freezing or dry up by attaining chill from a ceiling evaporator through natural convection in the ceiling of a containing room at the time of cooling and attaining chill from an auxiliary evaporator at the time of defrosting thereby sustaining a uniform temperature distribution in the containing room. CONSTITUTION: At the time of cooling, a main evaporator 7 and a ceiling evaporator 3 generate cold heat and a fan motor 9 is conducted to carry cold heat generated from the main evaporator 7 through an opening 5 into a containing room 2. Since the height of the opening 5 is one half that of the containing room 2, natural convection takes place easily. Cold heat generated from the ceiling evaporator 3 is led from the upper part to the central part of the containing room 2 thus making uniform temperature distribution. At the time of defrosting the evaporators 7, 3, they are cooled by an auxiliary evaporator 8 and cooled air being fed thereto by a fan motor 9 enters through an opening 6 into the containing room 2. A defrost heater 10 generates heat for defrosting upon conduction.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an ice-cold aging chamber for meat that prevents discoloration, freezing and drying of meat.

(b) Conventional technology Traditionally, meat was aged in water in 1983-1995.
There is one shown in Publication No. 11.

(c) The problem that the invention is trying to solve Preserving meat inside a warehouse is extremely difficult.

In other words, the inside of the warehouse is cooled by natural convection and humidified by forced circulation, but the problem with forced circulation is that the air speed inside the warehouse increases and the items dry faster. In addition, natural convection has a problem in that the temperature distribution inside the refrigerator is not constant due to a large temperature difference between the vicinity of the ceiling and the vicinity of the bottom plate, resulting in local freezing.

What is shown in Utility Model Publication No. 62-9511,
The above problem was not resolved.

This invention was made in view of the above circumstances, and in order to prevent meat stored in the refrigerator from discoloring, freezing, and drying,
To provide a meat water temperature aging warehouse in which the difference in temperature distribution inside the warehouse is extremely small and the amount of air blowing inside the warehouse can be reduced.

(d) Means for Solving the Problem] The invention takes cold air from the ceiling evaporator from the ceiling of the refrigerator through natural convection, and also directs cold air from the main evaporator into the refrigerator through a circulating cold air ventilation path. This is a meat water temperature aging chamber configured to guide and feed meat. Each of these evaporators undergoes cycle defrost operation (for each cooling operation,
Humidify by stopping the cooling operation until the evaporator humidity rises to 0°C or higher. When the evaporator is used to defrost, an auxiliary evaporator is used to cool the inside of the refrigerator.The detailed structure includes the main body of the device, which has a storage chamber for storing meat, and a ceiling evaporator installed on the ceiling of the storage chamber. For circulating cool air that extends downward from a first opening disposed in the storage chamber, passes under the bottom plate of the storage chamber, and further extends upward, and reaches the storage chamber from a second opening disposed opposite the first opening. A main evaporator and an auxiliary evaporator are arranged opposite to each other in the ventilation duct, a circulating cold air ventilation duct located below the bottom plate of the storage chamber, and a storage space is arranged near the outside of the main evaporator with respect to the auxiliary evaporator. The refrigerant circuit consists of a defrost heater for the evaporator, and a refrigerant circuit that is connected in circulation to the compressor, mandenser, and expansion valve that together with each evaporator constitute the refrigeration cycle.In addition, during cooling, this refrigerant circuit performs cycle defrost operation of the ceiling evaporator and the main evaporator. It is equipped with a switching valve that switches the refrigerant flow to perform a cycle defrost operation of the auxiliary evaporator during defrosting, and during cooling, it flows from the auxiliary evaporator to the main evaporator, and by switching the rotation direction, it switches from the auxiliary evaporator to the main evaporator during defrosting. This meat water temperature aging warehouse is equipped with a blower fan interposed between both evaporators in order to direct circulating cold air from the side to the auxiliary evaporator.

(e) During functional cooling, cold air is obtained from the ceiling evaporator in the upper part of the refrigerator, and the cold air from the main evaporator can be guided to a predetermined height inside the refrigerator through the circulating cold air ventilation path, and the temperature difference inside the refrigerator is reduced. Extremely small.

When defrosting the ceiling evaporator and main evaporator, cold air from the auxiliary evaporator is guided into the warehouse to reduce humidity changes.

(f) Embodiments This invention will be described in detail based on embodiments shown in FIGS. 1 to 8. However, this invention is not limited thereby.

FIG. 1, FIG. 2, and FIG. 3 show a side view, a front view, and a top view of the meat water temperature aging chamber R, respectively. In the meat water temperature aging warehouse R, a storage chamber 2 for storing meat is formed inside an equipment main body 1.

A ceiling evaporator 3 is disposed above the ceiling of the storage room 2. 4 is a ventilation path for circulating cold air.

The opening 5.6 of the circulating cold air ventilation path 4 is located approximately at the center of the height of the storage chamber 2. Reference numerals 7 and 8 denote a main evaporator and an auxiliary evaporator, respectively, which are disposed facing each other in the circulating cold air ventilation path 4. Reference numeral 9 is a fan motor, which is used to blow air through the circulating cold air ventilation path 4. The main evaporator 7 is provided with a defrost heater 10 for defrosting. FIG. 4 shows the configuration of the cold air supply means for sending cold air into the storage chamber 2. The cold air supply means includes a ceiling evaporator 3, a main evaporator 7, an auxiliary evaporator 8, a compressor 11, a condenser 12, a solenoid valve +3.14.15, and an expansion valve 16, 17.18.
It includes a defrost heater 10 and two refrigerant circulation paths (in the six directions of arrows and in the direction of arrow B).

When operating the meat water temperature aging warehouse R, during cooling, as shown in FIG. By circulating the heat to the main evaporator 7 and the ceiling evaporator 3, the main evaporator 7 and the ceiling evaporator 3 generate cold heat. At this time, the fan motor 9 is energized, and the cold heat generated from the main evaporator 7 is carried to the storage chamber 2 through the opening 5. The air that has received cold heat becomes heavier and flows downward, but since the height of the opening 5 is half the height of the storage chamber 2, natural convection can occur extremely easily. Further, the cold heat generated by the ceiling evaporator 3 is supplied to the center of the storage chamber 2 from the upper part of the storage chamber 2. At this time, the air that has received cold heat from the ceiling evaporator 3 moves downward, but only needs to be circulated up to the height of the opening 5. Therefore, the natural circulation of cool air in the storage chamber 2 requires only a very short distance in the vertical direction, so that the temperature distribution in the storage chamber 2 tends to be uniform.

Furthermore, since the cold air develops within the storage chamber 2 through almost natural circulation, there is no possibility that a large amount of moisture will be taken away from the meat stored within the storage chamber 2. Therefore, the meat stored in the storage chamber 2 is prevented from drying and freezing.

When removing frost that has adhered to the main evaporator 7 and the ceiling evaporator 3, use the solenoid valve 1 as shown in FIG.
4 is energized to open it and operate so that the refrigerant circulates to the auxiliary evaporator 8. The air in the circulating cold air ventilation path 4 is cooled by an auxiliary evaporator 8. At this time, since the fan motor 9 is blowing air from the main evaporator 7 toward the auxiliary evaporator 8, the cooled air is supplied into the storage chamber 2 through the opening 6. Moreover, at this time, the defrost heater IO is energized and generates heat to remove the frost attached to the main evaporator 7. Note that since the defrost heater 10 is attached near the part of the main evaporator 7 that is outside of the auxiliary evaporator 8, the heat generated by the defrost heater 10 has little effect on the cooling action of the auxiliary evaporator 8. . Furthermore, since the storage chamber 2 is cooled by the auxiliary evaporative lake 8 almost in a natural circulation manner, the stored meat is not exposed to strong wind, and discoloration and drying of the meat is suppressed to the utmost. In addition, the frost adhering to the main evaporator 7 and the ceiling evaporator 3 melts, thereby promoting humidification in the storage chamber 2.

In addition, a germicidal lamp 19 is arranged near the ceiling of the storage room 2,
The interior of the storage chamber 2 is sterilized, and the ozone prevents mold from adhering to the inner surface.

FIG. 7 shows a sequence diagram showing the operating state of the cold air supply means.

Further, FIG. 8 shows an electric circuit diagram related to the cold air supply means of the meat water temperature aging warehouse R. In addition, 19 is a defrost timer that constitutes a switching means, 20 is a capacitor for the fan motor 9, 21 is an overload relay, 22 is a compressor magnet switch, 23 is a defrost end thermostat, and 24.25 is an auxiliary In the relay, 26 is a delay timer.

For reference, here is an example of preserving meat in the above-mentioned meat freezing temperature aging chamber.

Humidity Temperature Wind Storage period of fast meat ■ 95%
0℃ 0 (natural convection) 9 days ■ 95% 0℃ 0
．． 5m/see 8.7 days (this condition is preferred)■ 80% 0°cog days■
80% 0°CO, 5m/sea 6.4 days ■ 80% 4°C 0 4 days (g) Effects of the invention This invention obtains cold air from the ceiling evaporator from the ceiling of the storage room by natural convection during cooling. When defrosting the meat, it is configured to be obtained by an auxiliary evaporator, and the temperature distribution in the storage room is maintained almost uniformly, so that there is less chance of strong wind, inappropriate temperature, or cold air being applied to the meat being stored and aged. This is a water-temperature aging room for meat that does not cause the meat to discolor, freeze, or dry.

[Brief explanation of the drawing]

Figures 1.2 and 3 are a side view, front view, and plan view of an embodiment of the present invention, respectively; Figure 4 is a configuration explanatory diagram showing the refrigerant flow path system of the cold air supply means of this embodiment; and Figure 5. 4 is a diagram corresponding to FIG. 4 during cooling of this embodiment, and FIG. 6 is a diagram corresponding to FIG. 4 during defrosting of the main evaporator and ceiling evaporator of this embodiment. FIG. 7 is a sequence diagram showing the operating state of the cold air supply means, and FIG. 8 is an electric circuit diagram relating to the cold air supply means of this embodiment. R... Meat water temperature aging warehouse, l... Equipment body, 2... Storage room, 3... Ceiling evaporator, 4... Ventilation duct for circulating cold air, 5.6...Opening, 7...Main evaporator, 8...Auxiliary evaporator, 9...Fan motor, 10...Defrost heater, 11...・Compressor, 12. ・Capacitor, 13.14.15... Solenoid valve. 4 Figure P 5 Figure Procedural Amendment Commissioner Kunio Ogawa 1, Indication of the case 1988 Patent Application No. 294835 2゜ Name of the invention Meat water temperature aging warehouse Representative Satoshi Iue 5, Amendment Date of Order Voluntary Amendment Contents 1, Mei III, page 4, line 12, ``defrost heater j for storage'' is corrected to ``defrost heater for defrost''. 2. In the 3rd line of page 5 of the same book, change ``to give direction,'' to ``
"To give you direction," he corrected. 3. rI on page 5, line 13 of the same ministry! ii) Corrected to ``total degree change''. 4. In the 5th line of page 8 of the same book, "electromagnetic pulp 14" is corrected to "electromagnetic valve 14." Claim 1: A device main body having a storage chamber for storing meat, a ceiling evaporator disposed on the ceiling of the storage chamber, and a storage chamber extending downward from a first opening disposed in the storage chamber. A circulating cool air ventilation path that passes under the bottom plate of the storage chamber and extends further upwards from a second opening disposed opposite to the first opening to the storage chamber, and a circulating cold air ventilation path located below the bottom plate of the storage chamber. A main evaporator and an auxiliary evaporator are arranged opposite to each other in a ventilation passage, a defrost heater for air is arranged near the outside of the main evaporator with respect to the auxiliary evaporator, and a compressor that constitutes a refrigeration cycle with each evaporator. , a condenser, and an expansion valve connected in circulation, and this refrigerant circuit performs cycle defrost operation of the ceiling evaporator and main evaporator during cooling, and cycle defrost operation of the auxiliary evaporator during defrosting. It is equipped with a switching valve that switches the refrigerant flow to perform cooling, and by switching the rotation direction, the circulating cool air is directed from the auxiliary evaporator side to the main evaporator side during defrosting, and from the main evaporator side to the auxiliary evaporator side during defrosting. A water temperature aging room for meat is equipped with a blower fan interposed between both evaporators.

Claims (1)

[Scope of Claims] 1. A device body having a storage chamber therein for storing meat, a ceiling evaporator disposed on the ceiling of the storage chamber, and a first opening disposed in the storage chamber extending downward. A circulating cold air ventilation path passing under the bottom plate of the storage chamber and extending further upward, leading from a second opening disposed opposite to the first opening to the storage chamber, and located below the bottom plate of the storage chamber. A main evaporator and an auxiliary evaporator are arranged to face each other in a circulating cold air ventilation path, a storage defrost heater is arranged near the outside of the main evaporator with respect to the auxiliary evaporator, and each evaporator constitutes a refrigeration cycle. It consists of a refrigerant circuit consisting of a compressor, a condenser, and an expansion valve connected in circulation, and this refrigerant circuit performs cycle defrost operation of the ceiling evaporator and main evaporator during cooling, and cycle defrost operation of the auxiliary evaporator during defrosting. It is equipped with a switching valve that switches the refrigerant flow to perform cooling, and directs the circulating cool air from the auxiliary evaporator side to the main evaporator side during cooling, and from the main evaporator side to the auxiliary evaporator side during defrosting by switching the rotation direction. For this purpose, a meat ice-cold aging warehouse is equipped with a blower fan interposed between both evaporators.